KO is returned and runner fumbles. Defense recovers and runs it into end zone.
KO is sky high. Defense runs down and catches it in the end zone. Like a pass.
Returning team tries to pass across the field and Defender intercepts and runs it into end zone. Similar to the fumble above.
This one I hadn't heard about-but its in the rule book. KO lands on the goal post and sits there. Defenders gather underneath and if the ball falls they catch it for a TD.
